US4191069A - Multi-speed gear transmission especially for use in warping machines - Google Patents

Multi-speed gear transmission especially for use in warping machines Download PDF

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Publication number
US4191069A
US4191069A US05/903,335 US90333578A US4191069A US 4191069 A US4191069 A US 4191069A US 90333578 A US90333578 A US 90333578A US 4191069 A US4191069 A US 4191069A
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Prior art keywords
gear
transmission
drive
drive input
shaft
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Expired - Lifetime
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US05/903,335
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English (en)
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Luigi Sasso
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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02H—WARPING, BEAMING OR LEASING
    • D02H13/00—Details of machines of the preceding groups
    • D02H13/12—Variable-speed driving mechanisms
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02H—WARPING, BEAMING OR LEASING
    • D02H3/00—Warping machines
    • D02H3/02—Sectional warpers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
    • F16H3/20—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear
    • F16H3/36—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with a single gear meshable with any of a set of coaxial gears of different diameters
    • F16H3/363—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with a single gear meshable with any of a set of coaxial gears of different diameters the teeth of the set of coaxial gears being arranged on a surface of generally conical shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
    • F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
    • F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing
    • F16H37/0833—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing with arrangements for dividing torque between two or more intermediate shafts, i.e. with two or more internal power paths

Definitions

  • the present invention relates to multi-speed gear transmissions especially for transmitting the drive from the warp cylinder of a sectional warping machine to the mechanism for moving a thread carriage of the said machine, of the kind having a gear change mechanism with several speeds interposed between drive input and output shafts of the transmission.
  • Sectional warping machines are used for winding onto a warp cylinder a very large quantity of warp threads destined to form the warp of a fabric.
  • the warp threads are unwound from respective bobbins carried upon a bobbin frame or creel.
  • the warp threads pass firstly through a cross reed and then through a reducing reed.
  • the reducing reed is carried by a thread carriage which is advanced by displacements equal to a fraction of the axial length of the warp cylinder so as to wind successively onto the latter sections or "loads", each of which is made up of a thread coming from each bobbin.
  • the carriage When the winding of one section or load is complete, the carriage is moved in the reverse direction until it reaches the position corresponding to the start of the winding of the next section or load.
  • This operation should ideally result in a perfectly cylindrical winding on the warp cylinder, since with such a winding each section or load is made up of an equal length of warp thread. It is possible to satisfy this requirement, however, only by choosing a precisely predetermined ratio between the speed of rotation of the warp cylinder and the speed of travel of the thread carriage.
  • the carriage is made to travel by rotation of a threaded shaft or leadscrew which in turn is driven by an output shaft of a multi-speed gear transmission having a drive input shaft which is coupled to the warp cylinder.
  • the criterion for selecting the pitch of the thread carriage movement that is, the amount of axial displacement of the carriage for each revolution of the warp cylinder is given by the following formula:
  • nf number of warp threads of the creel
  • Multi-speed gear transmissions consist of a gearing interposed between input and output drive shafts.
  • Such gearing is normally a mixed gearing comprising, in series, between a drive input and a drive output shaft, a gear change mechanism with two or three speeds and a Norton gear having a cone of gear wheels.
  • the gear wheels of the cone may be of the order of ten in number, thus allowing a hundred or more different drive speeds of "gear changes" to be obtained.
  • the object of the present invention is to provide a gear transmission with several speed ratios of the kind previously referred to which can offer an extremely high number (e.g. more than 1000) of speed ratios or "gear changes" and which is also of simple and compact construction.
  • a multi-speed gear transmission especially for transmitting drive from the warp cylinder of a sectional warping machine to mechanism for moving a thread carriage of the said warping machine, of the kind comprising a first gear mechanism with several gear ratios interposed between drive input and output shafts of a drive transmission, characterised in that the transmission comprises a second gear mechanism with several speed ratios mechanically connected to the drive input shaft and arranged in parallel with the said first gear mechanism, and in that the outputs of the two gear mechanisms are each mechanically coupled to a respective crown wheel of a differential gear having a planet carrier or spider which is in turn mechanically coupled to the output shaft of the gear transmission.
  • the differential gear combines the drive outputs of the two gear mechanisms, making it possible to produce a number of speed ratios or "gear changes" equal to the product of the numbers of ratios of the single gear mechanisms.
  • each gear mechanism is of the mixed kind consisting of a Norton gear and a gear change mechanism arranged mechanically in series with each other.
  • the use of two Norton gears makes it possible to produce for each gear mechanism a fairly high ratio with reduced overall dimensions, and constitutes a very simple solution from the constructional standpoint.
  • FIG. 1 is a diagrammatic plan view of a sectional warping machine fitted with a mutli-speed gear transmission according to the invention
  • FIG. 2 is a diagrammatic longitudinal section, on an enlarged scale, of part of a warp cylinder during thread winding by means of the warping machine shown in FIG. 1;
  • FIG. 3 is a diagrammatic perspective view, partly cut away, of a gear transmission according to a preferred embodiment of the invention.
  • FIG. 4 is a diagrammatic longitudinal sectional view of the said gear transmission.
  • a sectional warping machine is indicated generally by reference numeral 10 and comprises, inter alia, a warp cylinder 12 keyed to a shaft 13 which is driven by rotary drive means (not shown).
  • the warping machine 10 further includes a thread carriage 14 which is movable along a rotary screw-threaded shaft or leadscrew 16 extending parallel to the axis of the shaft 13.
  • the shaft 13 is connected directly, or through gearing or other coupling means, to the drive input shaft 18 of a multi-speed gear transmission 20 according to the present invention.
  • the transmission 20 has a drive output shaft 22 which is connected through a pair of gear wheels 24 or like coupling means to the threaded shaft or leadscrew 16 to rotate the latter.
  • FIG. 1 there is also shown a creel or bobbin frame 26 which holds a number of bobbins 38 from which individual warp threads 30 are fed to the warp cylinder 12, via a cross reed 32 and a reducer reed 34 carried by the thread carriage 14.
  • FIG. 2 is a longitudinal sectional view on an enlarged scale of part of the warp cylinder 12 showing how the warp threads 30 are wound onto the cylinder 12.
  • the reducer reed 34 carried by the carriage 14 is in the position shown, and it is caused to move firstly in the direction of the arrow A through a predetermined stroke C 1 , so as to form upon the cylinder 12 a first section or load P 1 of wound thread.
  • the carriage 14 is moved in the opposite direction, in the direction of the arrow B, by an amount C 1 +C 2 , before commencing the winding of a second section or load P 2 during a further movement of the carriage 14 in the direction of the arrow A through a stroke C 2 equal to C 1 .
  • Winding then proceeds in a similar manner to form the successive sections or loads P 3 , P 4 , P 5 . . . .
  • a winding is formed on the warp cylinder 12 which is as far as possible cylindrical, the profile of the winding being indicated by an unbroken line L 0 .
  • the speed of forward travel of the carriage 14 in the direction of the arrow A during each stroke C 1 , C 2 , . . . has to be predetermined with the greatest possible precision. If the speed of the carriage 14 is too great, this leads to a progressive reduction in the diameters of successive loads P 1 , P 2 , . . . , as indicated by the broken line L 1 , whereas if the speed of the carriage 14 is too low a progressive increase is produced in the diameters of successive loads, as indicated by the broken line L 2 . If a winding is effected with increasing or decreasing diameters of successive loads then the resulting fabric produced from the warp threads will be "crooked", with one selvedge shorter than the other.
  • FIGS. 3 and 4 illustrate a drive transmission 20 according to a preferred form of embodiment of the invention which allows these requirements to be met.
  • the drive transmission 20 has a metal casing which supports various rotary elements, including the drive input shaft 18 and the drive output shaft 22.
  • a gear wheel 36 is keyed onto the shaft 18 and meshes with two gear wheels 38 and 40.
  • the gear wheel 38 is keyed onto a drive input shaft 42 of a gear change mechanism 44 of the Maander type with three speed ratios selectable by means of a manual lever 46.
  • the gear change mechanism 44 has a drive output shaft 48 which in turn constitutes the drive input shaft of a first Norton gear 50 having a conical array of gear wheels 52 comprising, in the illustrated example, twenty gear wheels.
  • a planet wheel 54 is selectively engageable with the gear wheels 52 and meshes with a sun wheel 58 keyed for axial sliding movement upon a splined shaft 60 which constitutes the drive output shaft of the Norton gear 50.
  • the gear wheel 40 is keyed onto a layshaft 62 onto which there is also keyed a gear wheel 64 which transmits drive via a gear wheel 66 to the drive input shaft 68 of a second gear change mechanism 70 of the "Maander" type, having two speed ratios. These speeds can be selected by means of a manual lever 72 similar to the lever 46.
  • the drive output shaft 74 of the second gear change mechanism 70 is a splined shaft which constitutes the drive input shaft of a second Norton gear 76.
  • a gear wheel 78 is keyed onto the shaft 74 and is slidable axially thereon. The gear wheel 78 meshes with a planet wheel 80.
  • a manual control lever 82 similar to the lever 56, enables the planet wheel 80 to be engaged selectively with the various gear wheels of a second conical array of gear wheels 84 forming the second Norton gear 76.
  • the second conical array comprises fourteen gear wheels 84.
  • the second Norton gear 76 has a drive output shaft 86 onto which the gear wheels 84 are keyed.
  • a gear wheel 88 is keyed onto the driven shaft 86 of the second Norton gear 76, the gear wheel 88 meshing with a gear wheel 90 keyed onto a stub shaft 92 on which there is also keyed one of the crown wheels 94 of a differential gear 96.
  • a gear wheel 98 is keyed onto the driven shaft 60 of the first Norton gear 50, the gear wheel 98 meshing with a gear wheel 100 which is freely rotatable upon the drive output shaft 22 of the transmission 20 and is secured to the other crown wheel 102 of the differential gear 96 for rotation therewith.
  • the two crown wheels 94 and 102 are interconnected by planet wheels 104 of the differential gear 96, carried by a planet carrier or spider 106 which is secured to the drive output shaft 22 for rotation therewith.
  • the shaft 22 is coupled to the threaded shaft or leadscrew 16 through a pair of meshing gear wheels 24 and a clutch 108.
  • a gear transmission as herein described, with reference to FIGS. 3 and 4 provides, in a very limited space and with a simple structure, a total of 1680 speed ratios or "gear changes", equal to the product of the numbers of available gear ratios of the four gear mechanisms 44, 50, 70, 76. This very high number of gear speeds makes it possible to achieve the even winding of the warp cylinder which is the object of the invention.
  • a gear transmission according to the invention is also capable of being applied in different fields besides warping machines, and particularly to other types of winding machine.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Warping, Beaming, Or Leasing (AREA)
  • Looms (AREA)
  • Transmission Devices (AREA)
US05/903,335 1977-05-19 1978-05-05 Multi-speed gear transmission especially for use in warping machines Expired - Lifetime US4191069A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT68147A/77 1977-05-19
IT68147/77A IT1083061B (it) 1977-05-19 1977-05-19 Trasmissione a piu rapporti particolarmente per orditoi

Publications (1)

Publication Number Publication Date
US4191069A true US4191069A (en) 1980-03-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
US05/903,335 Expired - Lifetime US4191069A (en) 1977-05-19 1978-05-05 Multi-speed gear transmission especially for use in warping machines

Country Status (7)

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US (1) US4191069A (it)
BE (1) BE867161A (it)
DE (1) DE2820791A1 (it)
ES (1) ES469975A1 (it)
FR (1) FR2391299B1 (it)
GB (1) GB1597530A (it)
IT (1) IT1083061B (it)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003025426A2 (en) 2001-08-20 2003-03-27 Pawelec Slawomir Transmission ratio change unit having permanent stepped meshing gears
US7265067B1 (en) 1998-06-19 2007-09-04 The Procter & Gamble Company Apparatus for making structured paper
WO2011139950A2 (en) 2010-05-03 2011-11-10 The Procter & Gamble Company A papermaking belt having a permeable reinforcing structure
WO2011139999A1 (en) 2010-05-03 2011-11-10 The Procter & Gamble Company A papermaking belt having increased de-watering capability
CN102242436A (zh) * 2011-04-20 2011-11-16 绍兴县群方机械有限公司 分条整经机多档变速齿轮箱
CN109083985A (zh) * 2018-09-18 2018-12-25 浙江东方机电有限公司 一种减速比精确可靠的齿轮减速器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2600562A (en) * 1942-11-05 1952-06-17 S A T A M Sa Appareillages Mec Variable ratio transmission
US2697365A (en) * 1950-06-16 1954-12-21 Earl C Williams Power transmission equipment
US2833160A (en) * 1952-09-04 1958-05-06 Morgan Dev Lab Inc Transmissions
US3082646A (en) * 1958-09-23 1963-03-26 Harmonic Gears Proprietary Ltd Variable speed transmission mechanism
US3128662A (en) * 1961-01-13 1964-04-14 West Virginia Pulp & Paper Co Change gear mechanism
US3654822A (en) * 1970-05-01 1972-04-11 White Motor Corp Multiple countershafts transmission

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR358421A (fr) * 1905-10-11 1906-02-15 Arthur James Ickringill Mécanisme mesureur et repéreur spécialement applicable au montage de la chaine sur son ensouple dans les métiers à tisser et autres machines de ce genre

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2600562A (en) * 1942-11-05 1952-06-17 S A T A M Sa Appareillages Mec Variable ratio transmission
US2697365A (en) * 1950-06-16 1954-12-21 Earl C Williams Power transmission equipment
US2833160A (en) * 1952-09-04 1958-05-06 Morgan Dev Lab Inc Transmissions
US3082646A (en) * 1958-09-23 1963-03-26 Harmonic Gears Proprietary Ltd Variable speed transmission mechanism
US3128662A (en) * 1961-01-13 1964-04-14 West Virginia Pulp & Paper Co Change gear mechanism
US3654822A (en) * 1970-05-01 1972-04-11 White Motor Corp Multiple countershafts transmission

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7265067B1 (en) 1998-06-19 2007-09-04 The Procter & Gamble Company Apparatus for making structured paper
WO2003025426A2 (en) 2001-08-20 2003-03-27 Pawelec Slawomir Transmission ratio change unit having permanent stepped meshing gears
WO2003025426A3 (en) * 2001-08-20 2004-08-19 Slawomir Pawelec Transmission ratio change unit having permanent stepped meshing gears
WO2011139950A2 (en) 2010-05-03 2011-11-10 The Procter & Gamble Company A papermaking belt having a permeable reinforcing structure
WO2011139999A1 (en) 2010-05-03 2011-11-10 The Procter & Gamble Company A papermaking belt having increased de-watering capability
US8282783B2 (en) 2010-05-03 2012-10-09 The Procter & Gamble Company Papermaking belt having a permeable reinforcing structure
US8287693B2 (en) 2010-05-03 2012-10-16 The Procter & Gamble Company Papermaking belt having increased de-watering capability
CN102242436A (zh) * 2011-04-20 2011-11-16 绍兴县群方机械有限公司 分条整经机多档变速齿轮箱
CN102242436B (zh) * 2011-04-20 2013-10-09 绍兴县群方机械有限公司 分条整经机多档变速齿轮箱
CN109083985A (zh) * 2018-09-18 2018-12-25 浙江东方机电有限公司 一种减速比精确可靠的齿轮减速器

Also Published As

Publication number Publication date
ES469975A1 (es) 1979-03-16
FR2391299B1 (fr) 1985-09-27
DE2820791A1 (de) 1978-11-30
IT1083061B (it) 1985-05-21
BE867161A (fr) 1978-09-18
FR2391299A1 (fr) 1978-12-15
GB1597530A (en) 1981-09-09

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